package com.design.demo1;

import java.util.ArrayList;
import java.util.List;
/**
 * 迭代器模式测试
 * @author wdd_think
 *
 */
public class test {
	
	public static void main(String[] args) {
		List products = new ArrayList();
		products.add("倚天剑");
		products.add("屠龙刀");
		products.add("断肠草");
		products.add("葵花宝典");
		products.add("四十二章经");
		
		AbstractObjectList list;
		AbstractIterator iterator;
		
		list = new ProductList(products); //创建聚合对象
		iterator = list.createIterator();   //创建迭代器对象
		
		System.out.println("正向遍历：");    
		while(!iterator.isLast()) {
		    System.out.print(iterator.getNextItem() + "，");
		    iterator.next();
		}
		System.out.println();
		System.out.println("-----------------------------");
		System.out.println("逆向遍历：");
		while(!iterator.isFirst()) {
		    System.out.print(iterator.getPreviousItem() + "，");
		    iterator.previous();
		}
	}

}
